Ports used by on-prem HelpDesk

Question:

Besides TCP/80, are there any other ports required to be open when accessing Helpdesk through a firewall?

Answer:

In addition to TCP/80, the application may require:

1. Secure HTTP: if you install a TLS/SSL certificate, it will use TCP/443 or whatever port you configure for secure connections.
2. Email: the application checks email, so whitelist your mail ports (the ports used by your mail server).
3. Database: when hosted locally, the application connects to your SQL Server to exchange data.
4. Both of these are outbound connections, so opening any ports is not required.

Those are the only ports the application requires.